DockerCLI/cli/command/stack/kubernetes/cli.go

78 lines
1.9 KiB
Go

package kubernetes
import (
"github.com/docker/cli/cli/command"
"github.com/docker/cli/kubernetes"
flag "github.com/spf13/pflag"
kubeclient "k8s.io/client-go/kubernetes"
restclient "k8s.io/client-go/rest"
)
// KubeCli holds kubernetes specifics (client, namespace) with the command.Cli
type KubeCli struct {
command.Cli
kubeConfig *restclient.Config
kubeNamespace string
clientSet *kubeclient.Clientset
}
// Options contains resolved parameters to initialize kubernetes clients
type Options struct {
Namespace string
Config string
}
// NewOptions returns an Options initialized with command line flags
func NewOptions(flags *flag.FlagSet) Options {
var opts Options
if namespace, err := flags.GetString("namespace"); err == nil {
opts.Namespace = namespace
}
if kubeConfig, err := flags.GetString("kubeconfig"); err == nil {
opts.Config = kubeConfig
}
return opts
}
// AddNamespaceFlag adds the namespace flag to the given flag set
func AddNamespaceFlag(flags *flag.FlagSet) {
flags.String("namespace", "", "Kubernetes namespace to use")
flags.SetAnnotation("namespace", "kubernetes", nil)
flags.SetAnnotation("namespace", "experimentalCLI", nil)
}
// WrapCli wraps command.Cli with kubernetes specifics
func WrapCli(dockerCli command.Cli, opts Options) (*KubeCli, error) {
cli := &KubeCli{
Cli: dockerCli,
}
clientConfig := kubernetes.NewKubernetesConfig(opts.Config)
cli.kubeNamespace = opts.Namespace
if opts.Namespace == "" {
configNamespace, _, err := clientConfig.Namespace()
if err != nil {
return nil, err
}
cli.kubeNamespace = configNamespace
}
config, err := clientConfig.ClientConfig()
if err != nil {
return nil, err
}
cli.kubeConfig = config
clientSet, err := kubeclient.NewForConfig(config)
if err != nil {
return nil, err
}
cli.clientSet = clientSet
return cli, nil
}
func (c *KubeCli) composeClient() (*Factory, error) {
return NewFactory(c.kubeNamespace, c.kubeConfig, c.clientSet)
}